Method for manufacturing tip for metal cutting circular saw and method for manufacturing metal cutting circular saw using the same

A method for manufacturing a tip for a metal cutting circular saw in which a substantially rectangular parallelepiped tip is manufactured using an upper punch for pressing a sand-like tip-forming metal material from above, a lower punch for pressing the tip-forming metal material from below, and a mortar die having a cavity into which the tip-forming metal material is injected, the method comprising:

• making a lower surface of the upper punch into a forming surface of a rake face side portion of the tip;
• making an upper surface of the lower punch into a forming surface of an opposite side portion of the rake face of the tip;
• making one side inner surface of the cavity of the mortar die into a forming surface of a flank portion of the tip;
• making the other side inner surface of the cavity of the mortar die into a forming surface of an opposite side portion of the flank of the tip;
• injecting the tip-forming metal material into a forming space formed by entering the lower punch into the cavity of the mortar die;
• then, lowering the upper punch;
• forming the tip-forming metal material into a substantially oblong rectangular parallelepiped tip shape having a predetermined clearance angle and a predetermined rake angle by the upper punch, the lower punch, and the mortar die;
• and sintering the tip formed product.